[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Emulation](./puppeteer.protocol.emulation.md) > [DisplayFeature](./puppeteer.protocol.emulation.displayfeature.md) > [maskLength](./puppeteer.protocol.emulation.displayfeature.masklength.md) ## Protocol.Emulation.DisplayFeature.maskLength property A display feature may mask content such that it is not physically displayed - this length along with the offset describes this area. A display feature that only splits content will have a 0 mask\_length. Signature: ```typescript maskLength: integer; ```